Authors
Juliusz Gardawski
Collegium of Socio Economics, SGH Warsaw School of Economics, Warsaw, Poland
Rafał Towalski
Collegium of Socio Economics, SGH Warsaw School of Economics, Warsaw, Poland
© 2020 Juliusz Gardawski, Rafał Towalski, published by Warsaw School of Economics
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.